hi
It is a gold isotope.
Assuming there is a blank between "a" and "of," 178Au is an unstable isotope of gold. The 79 is its atomic number (number of protons), and 178 is the atomic mass (number of protons + numbers of neutrons).
The atomic symbol for gold is Au and its atomic number is 79.
AnswerGoldYou can find this on the periodic table of the elements. The element with atomic number 79 is gold, Au.
_The 79th element on the periodic table is Gold, Au
79 Au Gold 196.966569
#79 is Gold (Au).
Au 79
Au or Gold
gold, Au
Au is the chemical symbol for gold. It has an atomic number of 79 meaning it has 79 protons and 79 electrons. I assume that is what you mean
79 protons 118 neutrons 76 electrons